Caklyle whiffle



To ALL WHOM I'r MAY eoNeERN;

@atten tats# @anni @ffice CARLYLE WH-IPPLE, oF D-nr'no 1T, MICHIGAN Letters .Patent No. 66,271, dated July 2, 1867.

IMrnovrMENr 1N SAW-MILLS.

Be it known that I, CARLYLE WHIPPLE, of Detroit, in the countyiof-Wayne, and State of Michigan, have invented ,new and useful improvements in Hanging Saws and do hereby declare that 'the following is a full and complete description of the construction and operation ofthe same, reference being had to the accompanying drawings, making part of this specticationhin`ivhichl Figure 1 is a front view, and

Figure 2 is a vertical section of the sash and frame in which the sash is hung.

The sash is made in the usualmanner, except that the upper and lower beams extend beyond the rods that keep them in their proper position. The upper beam is shown at A, and the lowenonc is shown at B. Upon eachside of the saw are shown the rods() C, with screw-threads cut upon each end, which pass through the beams, and-are secured by heavynuts upon eachv side, asrshownat D D in iig. 1. By the adjustment of these nuts the saw can be strained to its properv tension. .Upon the inside of the posts E I place curved metallic guides or'ways for the sash to move upon". The ends of the cross-beams A B are slotted at their ends, or otherwise iitted to the guides F G. Y These guides are slightlyvcurved, as` shown in the several views, and suiciently so to give the desired rake to the saw during Vits stroke. The upper ones, shown at F, have their concave surfaces forward, andthe lower ones, shown at G, have their `convex surfaces forward.V F or ordinary use the amount of'curve in each pair should be about two inches, but the curve can be varied to suit the size of the mill or-.kind of timber to be sawed.4 By this arrangement the saw in its descent constantly changes its position iniregard to a vertical line. The lower end is irst throwniforward, while the upper end is at the same time thrown backward, and during the last half4 of the stroke the order isfclianged, the lower end of the saw receding while the upper end advances. In this manner a kind of swinging motion is given to the saw, which makes the cut much more effective than it could be if descending in a right line.

What I claim as my improvement, and desire to secure by Letters Patent, is-f The curved guides F and G, when the curvature of the upper is the reverse of the lower, arranged in relation tothe saw and operating substantially as and for the purpose specified.

CARLYLE WHIPPLE.

Witnesses:

DUNCAN MACKAY, A'. ALLIsoN. 

